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Automatic Laser-based Geometry Capture for Finite Element Analysis of Weld Beads

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Published on: July 25, 2025

Communicability geometry captures traffic flows in cities.

Meisam Akbarzadeh¹, Ernesto Estrada²

¹Department of Transportation Engineering, Isfahan University of Technology, Isfahan, Iran.

Nature Human Behaviour

|July 27, 2019

Summary

Vehicular traffic preferentially flows along communicability shortest paths, not just the shortest routes, in four diverse cities. This suggests drivers avoid congested central paths, opting for broader network routes.

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Area of Science:

Complex systems analysis
Network science
Urban mobility studies

Background:

Understanding network flow dynamics is crucial for complex systems.
Identifying item routes within networks remains a significant challenge.
Urban vehicular traffic provides real-world data for network flow models.

Purpose of the Study:

To investigate vehicular traffic flow patterns in urban networks.
To compare flow distribution between shortest paths and communicability shortest paths.
To explore the theoretical underpinnings of traffic route selection.

Main Methods:

Utilized observational data from four cities of varying characteristics.
Applied a coarse-grained theory of network traffic flow.
Derived a communicability function incorporating vehicular propagation speed.

Main Results:

Observed higher vehicular traffic flow on communicability shortest paths compared to traditional shortest paths.
Evidence supports an 'all-routes' flow model over simple shortest-path routing.
Traffic flow patterns were consistent across diverse urban environments.

Conclusions:

Communicability shortest paths better represent actual traffic flow than conventional shortest paths.
Drivers' route choices are influenced by perceptions of congestion, leading to 'all-routes' flow.
Findings enhance the understanding of complex network dynamics and urban mobility.